package com.example.mycnblog.config;

import com.example.mycnblog.common.AppVariable;
import com.example.mycnblog.entity.Userinfo;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

//登录拦截器
public class LoginInterceptor implements HandlerInterceptor {
    //true  -> 用户已登录
    //false -> 用户未登录
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session=request.getSession(false);
        if(session!=null&&session.getAttribute(AppVariable.USER_SESSION_KEY)!=null){
            //用户已登录
            System.out.println("当前登录用户为： "+((Userinfo)session.getAttribute(AppVariable.USER_SESSION_KEY)).getUsername());
            return true;
        }
        response.sendRedirect("/login.html");
        return false;
    }
}
